Support for typewriters or other office appliances



Sept. 29, 1931. E. KRADOLFER 1,824,822

SUPPORT FOR T-YPEWRITERS OR OTHER OFFICE Arrmlmcns Filed Oct. 9, 1930Patented Sept. 29, 1931 UNITED STATES PA ENr OFFICE nnnnsroxnanorrrn, ormnxrco, ,mnxrco sorron'rron rYrnwmTE'ns on OTHER orrronnrrnmnclzsApplication filed October 9,1930, Serial Ro. 487,545,'and in MexicoApril 25, 1980. I

The invention has for its object to provide a support for typewriters,calculating machines, telephones and other oflice appliances, soconstructed as to permit the appliance to be instantly raised out of theway,

the papers, books, pens and such, placed ontop of the desk after thetypewriter has been concealed within, must be cleared away before thetop is tilted for raising the machine, while the support of my inventionmay be lowered on top of anything not too thick placed on the table,which will then continue ready for use as soon as the support is raisedagain.

The invention has for its further object to provide the support withsuch means as will permit an easy lowering and lifting of the applianceplaced on it, preferably by means of springs acting as brakes orcounterweights.

I obtain these objects by means of the embodiment of my inventionillustrated in the accompanying drawings, in which Fig. l is a sideelevation of the support, in a raised position. v

Fig. 2 is a side elevation of the same support, lowered.

Fig. 3 is a plan view of the lowered support shown in Figure 2.

Fig. 4 shows in section one of the lateral guide plates with the brakelever and the rear supporting arm, on the plane indicated by the line 44of Fig. 3'.

As appears from these drawings, the support comprises a base board 1,which is secured to the table or desk top by means of screws, or ofclamps 2 placed along the edge of the desk 3 opposite to the personusing it.

The typewriter or any other appliance is placed on a rectangular board4, being secured thereto by hooks or screws. This board 4 is connectedwith board 1 by means of two pairs of metal arms 5 and 5, one

. pair on each side of said boards, said arms 'belng fastened at suchoints that the inclined adjacent edges 0 both boards will join when theupper board 4 is lowered, 5:! which is done by pulling it forward bymeans of the grip 6. In the raised position of board 4 shown in Figure1, the rear arms 5 rest against two stops 7 secured to the inner sidesof the lateral guide plates 8.

These guide plates 8 are preferably cut to a semi-circular shape andbent below at right angles and screwed with the bent in portion to theunder side of board 1, as shown in Figure 4. The upper edge of saidplates is bent inwardly and both plates are placed at such a distanceone from the other that any lateral play ofthe rear arms 5 is prevented,while the fore arms 5, the board 4 being raised, rest against the frontedges of said guide plates.

For balancing to a certain degree the weight of the typewriter or anyother appliance placed on board 4, a novel brake mechanism has beenprovided, which substantially consists of two rectangular iron bars 9,longitudinally slidable in the space comprlsed between the verticalportion of each guide plate 8 and the edge of the base board 1, thelower extremities of'both arms 5 and 5*? being pivoted to saidbars,'arn1s 5 on the outside and arms 5 on the insideof them. Each arm 5is further connected to the guide plate 8 of the same side by a lever 10pivoted with one end to said plate and havlng at its other extremity alongitudinal slot 11, in which moves a pin 12 secured to arm 5. Each bar9 is provided at its rear extremity with a rod 13 surrounded by a spiralspring 14 hearing against bar 9 and an angular stop 15 fastened to theback edge of board 1, through which stop passes the rod 13.

On lowering the board 4, the arms 5 are detained in a determinedposition by the levers 10, when the pins 12 have reached the extremitiesof the slots 11. As the appliance placed on board 4 continues to descendowing to its weight, the lower ends of arms 5, fastened to the bars 9,push these bars backward, against the pressure of the springs 14, theresistance increasing as said springs are more and more compressed. Theappliance placed on board 4 is thereby brought down very gradually,provided the strength of the springs is proportioned to the weight ofsaid appliance, and it is further much easier to raise the board 4together with the appliance, as the springs 14 tending to return totheir normal form push the bars 9 forward, raising thereby the arms 5detained by the levers 10.

The points at which the upper extremities of arms 5 and 5 are pivoted tothe board 4, are preferably placed higher than the upper level of saidboard, on tongues 16 extending upwardly from fiat irons 17 screwed tothe edges of said board. The same board is further preferably providedwith rubber feet 18. both for forming a resilient base and for elevatingsomewhat said board. Owing to the pivots being thus elevated, the arms 5and 5 are prevented from coming into a dead position, parallel to theboards 1 and 4, which would hinder the starting of the upward movementof board 4, as the springs 14 would push along the same line as saidarms are located in, and not tangentially thereto.

It is obvious that by using springs 14 of different strength, appliancesof any weight may be placed on board 4, and therefore the rods 13 arepreferably made detachable from the bars 9 so as to facilitate theinsertion of different springs.

The space on board 1 between the arms 5 and 5 may be occupied bydifferent oflice articles and implements, which will easily be clearedby the almost vertically ascending board 4.

I am aware that various details of construction may be varied through awide range without departing from the principles of this invention, andI therefore do not purpose limiting the patent granted otherwise thannecessitated by the prior art.

What I claim is:

1. A support for typewriters and other ofiice appliances, comprising astationary board. a second board supporting the appliance, laterallyconnected with said first board by means of pivoted arms whereby thesecond board may be guided to and supported in inoperative positionabove and in the rear of its operative position, and means acting asbrakes connected with said arms for substantially balancing the weightof said ap pliance on being raised from or lowered to the operativeposition.

2. A support for typewriters and other office appliances, comprising astationary base board, a second board supporting the appliance,laterally connected with said base board by pivoted arms whereby thesecond board may be guided to and supported in inoperative positionabove and in the rear of its operative position, vertical guide platesimpeding lateral play of said arms, stops on said guide plates fordetaining said arms in a backwardly inclined position, and means actingas brakes, connected with said arms, for substantially balancing theweight of said appliance on being raised from or lowered to theoperative position.

3. A support for typewriters and other office appliances, comprising aboard secured to the desk top, a second board supporting the appliancehaving arms laterally pivoted thereto, the lower extremity of said armsbeing pivoted to sliding members located along the sides of said baseboard whereby the second board may be guided to and supported ininoperative position above and in the rear of its operative position,springs disposed between the rear extremities of said sliding membersand fixed stops, means connected with said arms for pushing said slidingmembers against said springs on said arms reaching a determinedposition, and vertical guide plates for impeding side play of said arms.

4. A support for typewriters and other office appliances, comprising aboard secured to the desk top, bars slidabl disposed along two oppositeedges of said lioard, two arms pivoted in spaced relation at oppositesides of each of said bars, springs located between the rear ends ofsaid bars and fixed stops, vertical guide plates secured laterally tothe said stationary board for impeding side play of the rear arms,slotted levers connecting said guide plates with the front arms, and aboard supporting the ofiice appliance to which said four arms arepivoted at points elevated above the upper level of said board.

In testimony whereof I aflix my signature.

ERNESTO KRADOLFER.

